Tools / Text & Code
Local · Private · Free

HTML/CSS/JS Minifier

Strip comments, collapse whitespace, and shorten colors. Safe transforms only, with live size savings, right on your device.

Language auto-detects when you paste
Load file: drop or click

Your code never leaves your browser. Nothing is uploaded.

0 B before → 0 B after 0% saved

About HTML / CSS / JS Minifier

HTML / CSS / JS Minifier is a free, private text and code tool that runs entirely in your web browser. It minifies HTML, CSS, and JavaScript by stripping comments, collapsing whitespace, and shortening hex colors, with a live size savings readout as you type. Everything happens locally on your device. Your files are never uploaded to a server, there is no sign-up required, and it keeps working offline. Like every free online tool by Digital Heroes, this minifier is 100% free with no limits.

What you can do

How to use HTML / CSS / JS Minifier

  1. Open HTML / CSS / JS Minifier. It runs entirely in your browser with no signup.
  2. Paste your code into the Input area, or drop a file onto the Load file button. The language is detected automatically.
  3. Adjust the checkboxes to control which transforms are applied, such as stripping comments or shortening hex colors.
  4. Copy or download your result. It is free, and your data stays on your device.

Frequently asked questions

Is HTML / CSS / JS Minifier free?

Yes. This tool is completely free for everyone. No sign-up, no account, and no usage limits.

Is it private? Are my files uploaded anywhere?

No. The minifier runs entirely in your browser on your own device. Your code never leaves your computer and nothing is uploaded to a server.

Does it work offline?

Yes. Once the page has loaded it keeps working offline, and you can install it as an app from your browser.

Do I need to install anything or create an account?

No. Just open the page and start using it. Installing it as an app is optional and only adds offline convenience.

What does HTML / CSS / JS Minifier do?

It strips comments, collapses whitespace, and shortens hex colors across HTML, CSS, and JavaScript, with a live size savings readout after every change.

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